Magazine-rifle.



D. B. BUBAR m MAGAZINE RIFLE.

APPLICATION FILED APR. 1. 1914.

Patented May18 1915.

3 5HEETS-SHEET l.

w. M M w U D. BfBUBAH.

MAGAZINE RlFLE.

APPLICATION FILED APR. 7' 1914- v Patented May 18, 1915.

3 SHEETS-SHEET 2.

D. B. BUBAR.

MAGAZINE RIFLE.

APPLICATION FILED APR-7.1914.

Patented May 18, 1915.

3 SHEETS-SHEET 3.

\ sif lliilv wirtmeowa DEAN BRABSON BUBAR, OF ROSEBUR-G, OREGON.

MAGAZINE-RIFLE.

Specification or Iictters Patent. Patented Blay 1S, 1915.

Application filed April 7, 1914. Serial Ito. 830,174.

T9 all whom it may concern:

Be it known that I, DEAN BnAesoN Bu- BAR, a citizen of the United States, residing at Roseburg, in the county of Douglas and State of Oregon, have invented certain new and useful Improvements in Magazine Rifles; and I do hereby declare the follow.

ing to be a full, clear, and exact descriptiorof the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to fire arms, and more particularly to improvements in gas operated automatic rifles.

One of the principal objects of the invention is the provision of a fire arm, which utilizes a portion of the gases generated in firing, for operating the breech block of the gun, in automatically unloading and loading the same.

Another object of the invention is the provision of novel and improved means of operating the breech block for unlocking and locking the same.

A further object, of the invention contemplates an improved construction, arrangement, and operation of the hammer, scar and trigger.

A still further object of the invention is the provision of a fire arm of the class described which embodies features of general improvement, and which is simple, durable, eiiicient in operation and comparatively in expensive to manufacture.

lVith these and other objects in view which will become apparent as the description proceeds, the invention resides in the construction, combination and arrangement of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which like characters of reference indicate like parts throughout the several figures, of which,

Figure 1 represents a vertical, longitudinal sectional view taken through the breech of arifle constructed according to my invention, looking from the right hand side thereof. Fig. 2 represents a vertical transverse sectional view on the line 22, Fig. 3. Fig. 3 represents a vertical, longitudinal, sectional view taken through the breech of a rifle looking at the same from the left hand side thereof. Fig. 4 represents a side elevational. view of the muzzle of the rifle,

portions thereof being, shown in section.

Fig. 5 represents a horizontal sectional view on the line 5-5, l ig. 1 with breech block rearward. Fig. 6 represents a horizontal similar view with breech block advanced. Fig. 7 is a perspective view of the breech block showing the arcuate slot and'the extractor and ejector.

Referring more particularly to the drawings 5 represents the stock, 6 the barrel and 7 the breech casing of the rifle. A hollow tube 8 is secured below the barrel 6 of the rifle in a recess 9 formed in the upper edge of theforward extension 10 of the breech casing,-which tube extends from a point forwardly of the. center of the barrel to the rear end thereof, and said tube is closed at its forward end 11 and is provided with a partition 12 in spaced relation to the closed forward. end, in which partition is guided a. plunger rod 13, provided at its front end with a piston 14- adapted to be held normally toward the forward end of the tube by means ofia spring 15 interposed on the plunger rod between partition 12 and piston 14-, and said piston is adapted to be forced rearwardly by the expanding gases formed at the moment of firing, said gases having entrance to the tube through a port 16 which extends through the underwall of barrel. 6 and through a block 1.7 dovetailed into said underwall and supported by means of a second block 18, a screw 19 extending through the bottom wall of tube 8 through block 18 andinto block 17 for securing the latter in place.

It will be understood of course that piston ll will not be operated until the bullet has passed port 16, but having passed said port, the expanding gases will enter through the port into the forward end of the tube and abut against piston l t, forcing the latter rearwardly by the expansion 01 the gases. his rearward movement of plunger rod 13 will operate to unseat breech block 20, tlt'rough the medium of the link 21, pivoted as at 23 to the enlarged rear end 2i of plungelr rod 18, and being offset upwardly at its rear end as at 26, said offset 26 provrded with a pin 27 extending on one side thereof, and passing through a slot 30 formed in the Wall of the breech casing 7 and engaging an arcuate slot 28 formed; in

a depending lug 29 on breech block 20 and it is to be understood that the link, offset,

lug, pin and slots are duplicated at the-right side of the gun for equalizing the force ex" erted upon the breech block 20 for preventing any binding action thereof. The breech block is substantially of a rectangular for: mation, and when in locked position rests in a recess 31, formed in the upper wall of .the breech casingrearwardly of barrel 6,

and abutsat its rear end against a substan tially square shoulder 32 formed on the upper wall of the casing, and rests in a slightly inclined position as shown in Fig.3.

Upon rearward movement of plunger 13 and links 21, the pins 27 by engaging the rear walls of slots 28 and at the same time being guided by slots 80, will force the rear end of the breech block downwardly out of engagement with-shoulder 32, so that the block is forced rearwardly into the position shown :in dotted lines in Fig. 3 and full lines in Fig. 1, in which positionthe block abuts against a second shoulder 33 formed in the breech casing. After the breech block has reached this position and the bullet having left the muzzle of the rifie, spring 15 expands anddraws plunger 13, and links 2'1 forwardly, and. with them the block the latter being forced upwardly into locked po sitio'n as it reaches the forward end of its movement by reason of pins 27 contacting with the forward face of the slots 28', as will be readily understood;

' Wardly extending arm 53,

A hammer 34 is pivoted at its lower end on a pin 35 extending between the side walls of easing 7 forwardly. of trigger guard 36, and a rod-37, is pivoted at its forward end as at 38 to said hammer, and extends at its rear end into a tubular guide 39 pivoted. as at 40 on a lug 41 set into the front edge of stock 5, and a coiled spring 42 is interposed on rod 37 between said guide and a collar 43 stein-ed onthe rod, said spring 'tendingto normally force the hammer forward. A trigger 44, is pivoted as at 45 and is provided with 'a rearwardly extending arm 46 on which is pivoted the lower end of a lever 47, a spring 48 which tends to normally hold the upper end of vsaid lever in a forward position being" interposed between a' toe 49, on thelower end of said lever and a shoulder 50 formed on the trigger near the pivot point 45 thereof. 1 A three armed sear 51, is pivoted as at 52 between the side walls of the casing, and is provided with a rearwardly extending, forwardly extending, and up- 54 and 55 respectively, arm 55 being provided with a tooth adapted to engage a toothed lug 56 formed on the upperend of hammer" 34 when said rearwardly, it being understood that as the block moves rearwardly the hammer is ie-ngaged thereby and forced downwardly, at the same time, the curved upper end of lever 47 being engaged by the lug 29 for throwing shoulder 58 out of engagement with arm 53- of the sear, and allowing arm 55 thereof to engage the tooth56 on the hammer 34 as the latteris forced downwardly. As the breech block moves forwardly shoulder 58 is engaged under arm 53, and the hammer is held in cocked position by the engagement of tooth 56 with the tooth on arm 55' of the sear, and a pull on trigger 44 will raise the arm 46 on said trigger and with it lever 47, thereby disengaging arm 55 frcm tooth 56, and allowing the hammer to swing forwardly by the action of spring Arm 46 of trigger 44 is normally. held in lowered position by means of a leaf spring 5-), whiel'i is secured at its rear end to a block 60, an.

-thelower end of lever terminating in Juntaposition to toe (ll ofthe trigger, to one side of spring 59, and is ada )tod when latch is moved rearwardly from the position shown in Fig. 1 to engage ever said toe to prevent the trigger from being pulled. The breech casing is provided with a well,

its

of which partitions 68 and (39 form the walls,

and this well is adapted to receive the magazine 70 which is substantially rectangular,

and which is formed of end walls 71, a bottom 72 and side walls .755, the iatter at their upper edges being curved inwardly toward, each other, and being cut away forwardly and rearwardly as at Hand 75 respectively,

and a spring 75 actuates follower 7G con-v tainedwithin the magazine, and is adapted to normally force the cartridges .77 upwardly, the said cartridges being arranged in staggered relation, and occurring in two vertical series one of which series is supported by one of the steps 78 and the other by the step 7 9, which steps form the follower 76. When the magazine is inplace, the topformed on the lower surface of the breech block, which tongue is equal. in width to the distance between the upper edges of the side wall 73 of the magazine, so that as the breech block moves forwardly the Cartridge is engaged by the "tongue and is raised forwardly over a beveled surface 81 of the breech easing into the rear end of the barrel, in position for being exploded by the firing pin 82, as the latter is struck by hammer 34, As the breechblock moves rearwardly'the cartridge is ejected through the opening (58, and another cartridge is forced into position to be engaged by the block as it again moves forwardly.

The lugs 29 on the breech block 20 extend downwardly from each side thereof, and are engaged when the block is-in forward position, between the partitions 68 and 69 and the adjacent side wall of the casing, and the breech block bears at its sides against the opposite side walls of the easing at the upper portions thereof. The

magazine is provided with a spring keeper or latch 83 adapted to engage in a recess formed in one wall of the well in which the magazine is positioned.

For operating the breech block by hand, I have provided a block 84, positioned slidably on the forward extension 10 of the breech casing, and the pin 23 which connects plunger rod 13 and links 21, extends through slots 85 in the tube 8, and into block 84, the pin 23 being normally held against the shoulders 86 formed upon the inner wall of block 84 by the spring 15, so when plunger rod 13, pin 23 and links 21 are driven rearwardly by the pressure of gas, the same are capable of rearward movement independent of block 84, While if block 8% is forced rearwardly by hand, shoulder 86 engages the ends of pin 23 and forces the pin 23 and links 21 rearwardly so that the rifle may be used as a hand operated arm if so desired.

For extracting and ejecting the cartridges or shells I provide the breech block 20 with the recess 87 in which is pivotally' mounted the spring actuated extractor 88 at the right of the firing pin 82, and at the left side of the firing pin 82, is provided the bore 89 in which is slidably mounted the spring actuated ejector 90 for casting the shells outwardly through the opening 68 formed in the side of the breech casing 7 after the shells have been Withdrawn from the barrel by the extractor 88.

Although I have described the preferred embodiment of my invention, I may desire to make such changes in the construction, combination and arrangement, of parts as do not depart from the spirit'of the invention and scope of the appended claims.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent, is:

1. A magazine rifle, comprising a gun having a barrel with a beveled recess across the under portion of same with a gas passage leading from the rifle bore to said recess and having a breech block casing connected to the rear end of the barrel with a breech block reciprocating therein, a block having beveled sides inserted in said recess, said block having a bore adapted to register with the gas passage of said recesses when said block is properly mounted and leading to one side of said block, a second block arranged upon said first block, a tube mounted in said casing having a closed outer end] seated over said blocks with means arranged therein to fasten said tube to both of said blocks so that said bore in said first mentioned block will communicate with said tube, and devices mounted in said tube and 7 connected to said breech block adapted to automatically return to normal position f aftersaid devlces have been actuated by the exploded gases of said gun passing into said tube through said passage and said bore in said first mentioned block.

2. A magazine rifle, comprising a gun having a barrel with a breech block casing attached thereto, a breech block reciprocatingly mounted in said casing. a hammer pivoted in the lower part of said casing having means to throw said hammer within the pathof said breech block, said breech block lowering said hammer upon the rearward reciprocation thereof, a triple-armed scar pivoted in said casing, one of said arms adapted to latch said hammer into lowered position, the second of said arms coacting with a spring to retain said first mentioned arm in latching position, a trigger pivoted in said casing having a lugged arm, a lever pivoted upon said arm and cooperating with the third arm of said sear to unlatch said first mentioned arm to release saidhammer, said lever having a spring mounted between the lug on said trigger arm and the end of said lever adaptedto engage saidlever with said third arm of said sear.

3. A magazine rifle, comprisingagunhaving a breech block casing with a breech block reciprocatingly mounted therein, a vhammer pivoted therein adapted to be lowered by said breech block, pivoted means mounted in said casing adapted to'lock said hammer into lowered position, a trigger pivoted in said casing having an arm thereto with a pivoted lever arranged thereupon adapted to unlock said hammer locking means, and means pivoted in said casing, adapted at one end to engage said trigger arm to prevent the operation of said trigger, and at the opposite end pivotally connected with a thumb latch adapted to move said pivoted means into or out of engagement with said trigger ar1n,-said thumb latch 'having oppositely disposed flanges adapted. to slid- 5 ingly seat in suitable recesses in said casing to retain said thumb latch in position.

In testimony whereof I have signed my name to'this specification in the presence of two subscrlbmg witnesses.

'DEAN BRABSON BUBAR.

Witnesses: GEORGE W. YOUNG, Roy 0. YOUNG. 

